SOUTHERN CALIFORNIA EDISON Co

Wildfire Related Regulatory Proceedings

In response to the increase in wildfire activity, and faster progression of and increased damage from wildfires across SCE's service territory and throughout California, SCE has incurred wildfire mitigation, wildfire insurance and wildfire and drought restoration related spending at levels significantly exceeding amounts authorized in SCE's GRCs.

2021 GRC Wildfire Mitigation Memorandum Account Balances

The 2021 GRC decision authorized the establishment of balancing accounts for expenses for vegetation management, wildfire insurance, and the WCCP program, with expenditures up to certain thresholds approved for cost recovery. SCE may submit subsequent reasonableness review applications for any spending in excess of these thresholds. SCE has incurred vegetation management expenses and capital expenditures for WCCP in excess of thresholds established in the 2021 GRC. SCE has also incurred costs in excess of amounts authorized in the 2021 GRC related to other wildfire mitigation activities, including inspections and maintenance and to support execution of PSPS events.

In June 2022, SCE filed an application with the CPUC requesting reasonableness review of the incremental costs incurred in 2021 related to non-WCCP wildfire mitigation and vegetation management activities, requesting a total revenue requirement of approximately $327 million. In February 2024, the CPUC issued a proposed decision that, if adopted, will authorize a total revenue requirement of $310 million, along with ongoing capital revenue requirements and interest. These revenue requirements will be amortized over 12 months.

In October 2023, SCE requested authority to recover revenue requirements associated with 2022 operations and maintenance and capital expenditures above levels authorized in wildfire mitigation accounts and the vegetation management balancing account. The revenue requirement, including interest, is currently estimated at $384 million. In January 2024, SCE filed a supplemental motion for interim rate recovery to include $210 million of these costs and associated interest in revenue requirements beginning March 1, 2024.

2020 Emergency Wildfire Restoration

Multiple wildfires occurred during 2020 which caused damage within SCE's service territory and to SCE's Big Creek hydroelectric facility.

In March 2022, SCE filed a catastrophic event memorandum account application requesting recovery of $207 million of

operation and maintenance expenses incremental to authorized revenue requirements and $312 million of capital expenditures incremental to amounts authorized in the 2021 GRC primarily related to these restoration efforts. SCE has not yet filed for recovery of generation restoration costs, as repairs to hydroelectric generation facilities are not complete.

2024 FERC Formula Rate Annual Update

In November 2023, SCE filed its 2024 annual transmission revenue requirement update with the FERC, with the rate effective January 1, 2024. The update reflects a $1.1 billion transmission revenue requirement for 2024, $290 million or 20% lower than amounts included in the 2023 annual rates. The decrease is primarily due to returning an overcollection based on actual 2022 costs and lower wildfire-related claims.

Building Electrification Programs Application

In December 2021, SCE filed a $677 million Building Electrification Program Application for a four-year program (2024 – 2027) to incentivize replacing 250,000 gas-fueled water and space heaters with efficient electric heat pumps and to upgrade or enhance the electrical infrastructure for 65,000 homes to support electrification. The proposed program included $200 million for customer-side electrical infrastructure upgrades for which SCE requested inclusion as a regulatory asset in rate base, $69 million in capital expenditures and $408 million of operations and maintenance expense including heat pump incentives, program administration, and implementation costs. In January 2024, the CPUC issued a decision denying the application in its entirety.